:root {
  --bg:#0f0f11;
  --card:#1a1a1f;
  --text:#fff;
  --accent:#4f7cff;
  --danger:#ff4d4d;
}

* {
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:Arial;
}

body {
  background:var(--bg);
  color:var(--text);
}

header {
  background:#111218;
  padding:15px 20px;
  display:flex;
  justify-content:space-between;
  border-bottom:1px solid #222;
}

header a {
  color:white;
  margin-left:10px;
  text-decoration:none;
  opacity:0.85;
}

.container { padding:20px; }

.card {
  background:var(--card);
  padding:16px;
  border-radius:12px;
  border:1px solid #2a2a33;
  margin-bottom:15px;
}

input {
  width:100%;
  padding:10px;
  margin-top:8px;
  border-radius:10px;
  border:1px solid #333;
  background:#111;
  color:white;
}

button {
  width:100%;
  padding:10px;
  margin-top:10px;
  background:var(--accent);
  border:none;
  color:white;
  border-radius:10px;
  cursor:pointer;
}